I belive things are loading correctly...

justfile

@@ -3,7 +3,7 @@ VERSION := `git rev-parse --short HEAD`
 check:
     cargo check -p tetris
 
-play:
+run:
     cargo run -p tetris
 
 bindgen profile name:

tetris/src/blocks.rs

@@ -65,16 +65,31 @@ impl AssetLoader for ShapeAssetLoader {
 
 /// Initialize camera and block game area
 fn load_assets(server: Res<AssetServer>, mut all_assets: ResMut<AllAssets>) {
-    all_assets.handles.push(server.load::<ShapeAsset>("t.shape.toml").untyped());
+    all_assets
+        .handles
+        .push(server.load::<ShapeAsset>("t.shape.toml").untyped());
 }
 
+/// Spawn the tetris 2d camera
 fn setup_camera(mut commands: Commands) {
     commands.spawn((Camera2d, Camera::default()));
 }
 
-fn setup_blocks(mut commands: Commands) {
-    error!("Setup blocks");
-    error!("Once all steps are setup, move on to Run");
+/// Spawn a block
+/// This system is temporary
+fn setup_blocks(
+    mut commands: Commands,
+    all_assets: Res<AllAssets>,
+    server: Res<AssetServer>,
+    mut checklist: ResMut<SetupChecklist>,
+) {
+    let h: Handle<ShapeAsset> = server
+        .get_handle(all_assets.handles[0].path().unwrap())
+        .unwrap();
+
+    commands.spawn(AssetComponent::new(h));
+
+    checklist.spawn_shape = true;
 }
 
 /// Event handler for transforming a handle component into a thing

tetris/src/main.rs

@@ -17,15 +17,23 @@ fn main() {
         .init_state::<Debugger>()
         .init_state::<GameState>()
         .init_resource::<AllAssets>()
-        .add_systems(Update, load)
+        .init_resource::<SetupChecklist>()
+        // Check if assets were added to loading queue
+        .add_systems(
+            Update,
+            loading_check
+                .run_if(in_state(Loading::Active))
+                .run_if(resource_changed::<AllAssets>),
+        )
+        // Wait for pending assets to be loaded
+        .add_systems(Update, loading_wait.run_if(in_state(Loading::Active)))
+        // Once done loading, move to the setup state
+        .add_systems(OnEnter(Loading::Idle), setup_game)
+        // Check if the game is ready to progress
+        .add_systems(Update, setup_wait.run_if(in_state(GameState::Setup)))
         .run();
 }
 
-#[derive(Default, Resource, Debug)]
-struct AllAssets {
-    handles: Vec<UntypedHandle>,
-}
-
 /// Reports if the game is loading assets
 #[derive(States, Default, Clone, Eq, Debug, PartialEq, Hash)]
 enum Loading {
@@ -46,16 +54,67 @@ enum Debugger {
 #[derive(States, Default, Clone, Eq, Debug, PartialEq, Hash)]
 enum GameState {
     #[default]
+    Boot,
     Setup,
     Run,
 }
 
-fn load(mut next: ResMut<NextState<Loading>>, server: Res<AssetServer>, assets: Res<AllAssets>) {
-    if assets.handles.iter().all(|h| matches!(server.get_load_state(h.id()), Some(LoadState::Loaded))) {
+/// A list of all assets so we don't lose them
+#[derive(Default, Resource, Debug)]
+struct AllAssets {
+    handles: Vec<UntypedHandle>,
+}
+
+/// A "checklist" to know if we can progress from setup to the game
+#[derive(Default, Resource)]
+struct SetupChecklist {
+    spawn_shape: bool,
+}
+
+/// Sends the game into Loading::Active if assets are added to the AllAssets list
+fn loading_check(mut next: ResMut<NextState<Loading>>, all_assets: Res<AllAssets>) {
+    debug_assert!(all_assets.is_changed());
+
+    next.set(Loading::Active);
+}
+
+/// Waits in Loading::Active until all assets are loaded then move to Loading::Idle
+fn loading_wait(
+    curr: Res<State<Loading>>,
+    mut next: ResMut<NextState<Loading>>,
+    server: Res<AssetServer>,
+    all_assets: Res<AllAssets>,
+) {
+    debug_assert!(*curr.get() == Loading::Active);
+    if all_assets
+        .handles
+        .iter()
+        .all(|h| matches!(server.get_load_state(h.id()), Some(LoadState::Loaded)))
+    {
         next.set(Loading::Idle);
     }
 }
 
+/// Moves the game from Boot to Setup
+fn setup_game(curr: Res<State<GameState>>, mut next: ResMut<NextState<GameState>>) {
+    debug_assert!(*curr.get() == GameState::Boot);
+
+    next.set(GameState::Setup);
+}
+
+fn setup_wait(
+    curr: Res<State<GameState>>,
+    mut next: ResMut<NextState<GameState>>,
+    checklist: Res<SetupChecklist>,
+) {
+    debug_assert!(*curr.get() == GameState::Setup);
+
+    // If all checks pass, move on to the run state
+    if checklist.spawn_shape {
+        next.set(GameState::Run);
+    }
+}
+
 /// A wrapper around a handle for assigning an arbitrary Handle<T> to an entity
 #[derive(Debug, Component)]
 struct AssetComponent<T: Asset> {